Bemka Black Truffle Sunflower Oil Black Truffle Sunflower Oil has a very pale yellow color. Black Truffle Sunflower Oil can be used for finishing on meat, fish or mashed potatoes, or to make vinaigrette or mayonnaise. It is a classic for omelets, and is excellent as a condiment for bruschette, carpaccio, bresaola, meat, or tossed in pasta or salads.